Power-transmission gearing.



PATENTED FEB. 26, 1907.

H. R. MGCONNELL. POWER TRANSMISSION GEA RING,

APPLICATION FILED JUNE 20. 190G.

nnrrsn so.

Parana Fries.

HARRY R. ivicCONNEL OF WASHINGTON, DISTRICT OF COLUMBLA.

scwss rnansnn '10 (all: whom, it may concern.-

Be it known that I, HARRY R. MCCUNNELL, a citizen of the United Statesfresid at Washington, in the District of .Qolnm ia, have invented certain new and useful Improvements in Tower-Transmission Gearing, of which the following is a specification.

This invention relates to new and useful improvements in power-transmission gear- 0 ing, and contemplates a structure especially designed for automobile variable-speed transm1ss1ons.

The invention arms as a primary ob ect to provide a device of the above type in which 5 a maximum number of difi'erent speeds may be attained and in which a mimnuim slze and degree of space for installation is afforded The invention aims as'a further object -to provide sim lo and inexpensive means for;

controllingt e operative relation of the-various gears embodied in the structure.

In connection with the above means it is a further object of the invention to provide a hand-lever operating in conjunction with an.

5 indicating-guide sector, whereby the particular gears in operative relation and the rela 'tive speed at which the machine is moving may be instantly ascertained.

The detailed construction -Will appear ino the course of the following description, in

which reference is had to the accompanying drawings, forming a part .of this specification, like numerals designating like parts throughout the several views, wherein I Figure 1 is a central longitudinal section of a power-transmission gearing constructed in accordance with my invention, the. controlling elements thereof being shown in side elevation. l ig. 2 is an elevation of the controllingdever, the appurtenant elements thereof being illustrated in .a section taken on the line2 2 of Fig. llooking in the direction; of the arrow; and--l ig. 3 is a centralsaints (enema-its.

{specification Letters Patent. Application filed June '20, 1906. Serial No. 322,612. I

Patented m. 2 ,1907.

geanwheels. The respective shafts A and B are .j ournaled' in the hubs of the respective gear-wheels, and the hub of each sueces-' sively smaller gear-wheel in each series 60 thereof is journaled in the hub of the adjaeent larger gear-wheel. The outermost gears of each series are journaled 1D. antiriction-bearings which constitute a support for the gearing as an entirety. In this relation of the various gears manually -'controlled means are provided for throwing a selected gear of'the primary series into operative: en-

vided for indicating the particular gearswhich are in operative relation at a given time.

eral construction of, the apparatuses an entirety and is intended to aid in an understanding of the description of the specific 1 The above description relates to the gen; 75

elements, which now follows; The gearing embodied in the-=present inventionis'supported in antifriction-bearings 1 ands-2 of approved form. *Loosely mounted upon the shaft A are primary gear-wheels 3, 5, and 7,} which are free to rotate upon said shaft and are coaxial therewith. Secondary gearwheels 4 and 6 are mounted in a similar mane alinement with the shaft A, so that the axes of the respective primary gears 3, 5, and 7 and secondary gears 4 and 6 will be eccentrically disposed with relation-*t'o one another. The gear 3 is of' substantial cup shapefand comprises a body portion,8 ina substantiaily vertical plane, which carries an angularly-extending peripheral flange 9, formed on it's inner-face with teeth 10.

The body portion 8 is formed With a cen- '5 nor upon the shaft B. The shaft B is out of gagement or relation with a selected gearof the secondary series, and means are" proo trally-located hub 11, terminating in,a rep duced annularextension 12, by which said gear is journaled inthe bearing 1, the shaft A extension 12. Said gear 3 is formed with a dished portion 13 in its inner face, within which is seatedthe body portion 14 of the gear 5. Said body portion is formed with a central hub 15, which interfits and is revolu- .10 5 ble in the hub 11 of the. gear 3 as a bearing. a

The gear 5 is formed with outer and inner' peripheral teeth 16 and 17 and is of the same general conformation. as the gear 3. The

gear 7 is loosely mounted upon the end of the. e

shaft A and is of the usual pinion type,,being being projected through and journaled in the x00 formed with teeth 18. The secondary gears:

4 and 6 are of substantially the same conformation as the respective gears 3 and and are mounted upon the shaft B in the same manner, the gear 4 being formed with a hub 19- and an extension 20, journaled in the bearing 2, and the gear 6 being formed with a Fig. 3 and by the section-line 3 3 of Fig. 1.

' keyway 27, and the shaft -B is formed with a The gears 4 and 6 are arranged in opposing.

or confronting relation to the primary gears and are designed to engage a selected primary gear on eitherside thereof. To this end the gear 4is formed with outer and inner peripheral teeth 23 and 24 and the gear 6 with similarly-arranged teeth 25 and 26.

The shaft A is formed with an elongated keyway 28. Splined upon said s. s are collars 29 and 30, which have a sliding adjustment upon said shafts and are rotatable therewith. The gears 3 and 4 are providedin their extensions 12 and 20 with longitudinal .arcuate recesses 31 and 32 and forwardly of said recesses with an inwardly-extending flange 33. In like manner the gears 5 and 6 are formed with sinilarly-eonstructed rec'esses 35 and 36, the gear 5 being formed adjacent the recess 35 with a flange The gear 7 is formed with a recess 37, extending theret-hrough. The various recesses above set forth coast with the adjacent keyways 27 and 28 in registering relation to form pockets for the reception of adjust ably-positioned keys, which are englployed in each series of primary and secon ary gears to throw any selected pair of said gears into operative relation in accordance with the relative degree of speed desired. To this end a. key 38 is carried by the collar 30 and a key 39 is carried by the collar 29. The keys 38 and. 39 are proportioned in accordance ndth the nuniber of gears with relation to which they have adjustment, but are counterparts in construction. Each of said keys is of substantial L shape, carrying upon its longer leg 8. leaf-spring 38, which bears in the adjacent keyway 27 or 28, and being pivoted at the end of its'shorter vertical leg, as at 40, to the adjacent collar, by which said keys are respectively carried and adjusted. Said keys each terminate in enlargedheads 33", designed for operative engagement with the several recesses in the gears, and the heads 38 are provided with inclined end faces 38", designed to ride over the flanges 33 and 34 in the adjustable movement of said keys.

For effecting an adjustment of the keys and 39 a novel mechanical arrangement of s. ments is provided, comprising a support- By virtue of ing-braeket 41, provided with a horizontal elongated arm 42-. A lever 43 is fulcrumed in its upper portion, as at 44, to the arm 42,

said lever being provided witha bifurcated lower end 45: The furcations of the end 45 are severally formed with short-length vertical slots 46, within which are-loosely received pins 48, carried by an annulus 49, loosely mounted within a recess in the collar 29. in like manner the lever 50 is fulcrumed in its lower portion, as at 51, to a stationar supporting-arm 52 and has connection wit the collar 30; Owing to the fact that the lever 43 is fulerumed in its .upper portion, its pivotal movement will be multiplied,'so as to compensate for the greater line of adjustment required by the key 39. The bracket 41 carries at its upper end an are-sector 53, provided with an alined series of depressions 54. A hand-lever 55 is fulcrumed upon the bracket 41, as at 55 and carries an element which coacts with elements carried by the levers 43 and 50 in eifecting a pivotal movement of said levers. The lever 43 is provided with an arm 57, and the lever 50 is provided with an elongated arm 56, the arms 57 and 56 being fulcrumcd to the upper end of the levers 43 and 50, as at 58. The lever 55 is formed in its body portion with openings 59 and 60 extending therethrough and separated by an integral spacing-bar 61, said openingsbeing for the individual reception of the respective arms 57 and 56. The lever 55 carries a'sliding pawl 62, movable in guide-brackets 63 and designed to be raised by a cam-handle 64. The handle 64 and the pawl 62 are fulerum'ed to the ends of links 65, which are in turn pivoted, as at 66, to the lever 55. Pawl 62 is normally held downward by means of an expansi've coil-spring 67 havin its one and se cured to said pawl audits ot er end bearing against anapertured lug 68 upon. the lever 55, and through which said pawl projects. The pawl 62 is provided with upper and lower confronting teeth 69 and 70, designed to engage corrcspondingly-arrangedrecesses 71 and 72 in the arms 57 and 56. Mounted adjacent to the handle of the lever 55 is a spring-pressed button 73, designed to yieldto the shafts A and B. This operative en gagement is controlled by the position of the its shown in Fi 1, the-gears 6 and 7 are operatively engage with relation keys 38 and 39, and in the disclosure the key 38 is engaged in the recess 36 of the gear.

6 and the key 39 is engaged in the recessli?hf the gear 7. It will be readily apparent the disclosure in Fig. 3 that the medial gears are eccentrically disposed to thegears on each side thereof and will engage-or'mesh with said gears at opposite points. "Inthe '1 number of tions in the'en'gagement of t e keyBQ-Iwith the-several rim-ary gears when the key 38 is engaged .wit the' gearfi and three low-speed variations in like manner when'the key 38 is engaged with the gear 4'. In effecting an ad' justmentof the keysthe arms 57'and 56 are reciprocated independently in the desired. di-

motion to swing the levers l3 and 50, and

thus move the respective collars 29 and 30 and the keys carried therehy. In Fig. 1.the pawl 62 is disclosed as raised by the cam 64 against the tension of the spring 67. In this position of the pawl the tooth 70 will engage the recess 7 2. In the forward position of the lever 55, as shown, the pawl 62being in engagement with the arm 56, the key 38will engage the gear 6. When said lever is moved rearwardly to the last depression 54, the key 38 will engage the pinion 4. When the pawl 62 is released, the spring '67 will force the same downwardly, and the tooth 69 will engage in the recess 71 after the lever 55 has been-moved adjacent to said recess. In the rearmdst position of'the lever, the pawl 62 being engaged with the arm 57, the key 39 will engage thepinion 7. A movement of the lever to the central depression 54 engages K the key 39 with the pinion 5, and a movement of the lever to the most forward. depression engages the key 39 with the gear 3. The relative degree of speed at which the machine is moving can tained by noting with which of the arms 57 and 56 thepaw-l 62 is o'peratively engaged and the positionof thekeys in such engagement by noting thepos'itions of the recesses 71 and 72 with relation to the depressions 54.

. If desired, suitable indicating signs or marks can be applied to the sector 53 to facilitate the reading of the positions of the keys in the manner above set forth. It'is readily-apparent from the foregoing description that the number of gears may be increased or decreased at will in accordance with the number of speed variations desired, but that it is essential to preserve the arrangement of such gears.

While the elements herein shown and described are well adapted to serve the functions set forth, it is obvious that various minor changes, may be made in the proportions, sh'ape, 'and arrangement of the several parts without departing from the spirit and scope of the invention as defined in the appended claims.

V gpr imaryan'dsecon gears employed s x speed varia-; tions are-air'orded'-three higlh speed'varia? e instantly ascer Having fully' described my invention, I

said primer shaft, aplurality of graduated gears carrie by said secondary shaft, each of said gears being in meshwith the gears of the opposing series on eachside thereof, whereby both series of gear'sas an entirety are in constant intermeshing engagement, and means for operatively engaging said shafts with a selected one of said respective gears.

v 2. A variable --s eed gearing com risin primary and secon ary nonalind sh ts an operativeeonnections thereb etween comprising' toothed wheels carried in'spaced concentricseries by each of-said shafts and eccentrically disposed but in interrneshing engagement with the adjacent wheels on either side thereof and means for operatively engaging said shaftswith a selected one of said respective gears.

. 3. A variable-s eed gearing com risin primary and secon ary non-alined sha ts an ing a plurality of graduated gears carried by operative connections therebetwecn comprising toothed wheels carried in s aced'concentric series by each of said sha ts and eccentrically disposed but in intermeshing engagement with the adjacent wheels on either side thereof, said shafts being provided with longitudinal rwesses and said toothed Wheels be ing severally" provided with recesses registering with said first-named recesses and means for operatively engaging said shafts with a selected one of said res ective gears embodying keys slidable in sair longitudinal recesses and manuallycontrolled means for sliding said keys.

4:. The combination with a primary and secondary shaft, intermeshing gear-wheels interposed therebetween and carried thereby and slidable connections for establishing an o erative relation between either one of said sl ia'lts and a selected respective gear carried thereby, of means for imparting sliding movement to said connections comprising a main olperating-lever, arms loosely sup orted t 1 ereby, stationaril -pivoted levers aving at their ends ivota connection with the adjacent ones 0 said arms and said slidablc connections and means for engaging said main lever with either of said arms at selected points thereon.

In testimony whereof I affix my's'ignature in presence of two witnesses. HARRY R.-l\Z[oCONNELL Witnesses: J. W. MCCONNELL,

J. J. MCLEAN. 

